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提出了一种利用文丘里管喷射粒化高炉熔渣的方法,选用与高炉熔渣的凝固特性较为相似的熔融白砂糖进行粒化模拟实验.研究了喷管收缩段的收缩角度、喉部长度以及射流速度对粒化效果的影响.实验结果发现:表面张力和黏度较大的熔融白砂糖被喷射凝固产物主要为颗粒,并伴随少量丝状物,绝大部分颗粒粒径小于5mm,丝状物直径在0.1mm左右.随着射流速度的增大,颗粒更加均匀,粒径也更小,而丝状产物随射流速度增大呈先增多后减少的现象.喷管喉部不宜过长,否则产生的颗粒粒径较大,且丝状产物多.增大收缩角,可减小颗粒粒径和减少丝状物生成量.通过合理选择喷管几何参数和射流速度,可以有效粒化熔融液,同时使得丝状产物生成量较小.砂糖实验表明,可使丝状物产量小于1%,几乎所有颗粒粒径均小于5mm.
In this paper, a method of granulating blast furnace slag by jetting of Venturi tube is proposed, and the granulation simulation of molten white granulated sugar, which is similar to the solidification property of blast furnace slag, is carried out. The shrinkage angle of throat section, And jet speed on the effect of granulation.Experimental results showed that: the melt viscosity of white sugar granulated with a large surface tension and viscosity is mainly particles, accompanied by a small amount of filaments, the vast majority of particle size less than 5mm, filamentous The diameter of the material is about 0.1mm.With the increase of the jet velocity, the particles are more uniform and the particle size is smaller, while the filamentous product increases firstly and then decreases with the increase of the jet velocity.The jet larynx should not be too long, Otherwise, the larger the particle size and the more filamentous products, the larger the angle of shrinkage, the smaller the particle size and the less the filament formation rate.Through the reasonable choice of nozzle geometry and jet velocity, Liquid, and at the same time, the amount of filamentous product formed is smaller.The sugar experiment shows that the filament yield can be less than 1%, and the particle size of almost all particles is less than 5 mm.